Check if column or diagonal in matrix = x (Without Numpy)

Question

I can use this code to check if a row in a matrix = x:

q = [[1,2,1],[1,2,1],[2,1,2]]
answer = [sum(row) for row in q]
for i in range(0, len(q)):
    if answe         


        

Answer 1

Well you could translate your enumeration of winning conditions into a tuple, of tuple of pairs ... not to much work in a 3x3 board world.

Something like below (taking your sample board) and resulting in a tie should get you started in further learning Python:

#! /usr/bin/env python
"""Check in snaive 3x3 game board world for diagonal,
column, or row all ocupied by one player."""
from __future__ import print_function

players = (1, 2)  # Code for the players
board = [[1, 2, 1],  # Board interpreted as 3 lists rows
         [1, 2, 1],
         [2, 1, 2]]
winning_configs = (  # outer-inner-index pairs that win:
    ((0, 0), (1, 1), (2, 2)),  # TL to BR diagonal
    ((0, 2), (1, 1), (2, 0)),  # TR to BL diagonal
    ((0, 0), (1, 0), (2, 0)),  # L column
    ((0, 1), (1, 1), (2, 1)),  # M column
    ((0, 2), (1, 2), (2, 2)),  # R column
    ((0, 0), (0, 1), (0, 2)),  # L row
    ((1, 0), (1, 1), (1, 2)),  # M row
    ((2, 0), (2, 1), (2, 2)),  # R row
)


def and_the_winner_is(players, board, winning_configs):
    """First one matching rules is returned as winner,
    otherwise None to indicate a tie."""
    for player in players:
        for cfg in winning_configs:
            if all([board[i][j] == player for i, j in cfg]):
                return player
    else:
        return None


def main():
    """Determine the result from board."""
    winner = and_the_winner_is(players, board, winning_configs)

    if winner in players:
        print('Winner is Player({})'.format(winner))
    else:
        print('A tie')


if __name__ == '__main__':
    main()